Sharpening-roller arrangement for the revolving sickle knives in cigarette-rod machines



April 1, 1930. HQHN 1,752,341

' SHARPENING ROLLER ARRANGEMENT FOR THE REVOLVING SICKLE KNIVES IN CIGARETTE ROD MACHINES Filed NOV. 29, 1927 2 Sheets-Sheet 1 Fig. 4

/N yew Tag M. E. HOHN 1,752,341 SHARPENING ROLLER ARRANGEMENT FOR THE REVOLVING SICKLE April 1, 1930.

KNIVES IN CIGARETTE ROD MACHINES 1927 2 Sheets-Sheet 2 Filed Nov. 29,

k UNITED Patented Apr. 1, 1930 g MAXI PAUL ERNSTHOHN, OE D'RESDEN, GERMANY, ASSIGNOR TO THE FIRM UNIVER SELLE CIGARETTENMASCHINEN-IFABRIK T. C. MULLER & 00., DRE SDEN, GER-- MANY 1 V SHARPENING-ROLLERJARR' er/innit FOR THE BEVOIiVING sIcKLE KNIVES IN CIGARETTE-BOD .MACHINES Application filed November 29, 1927 Seria1 No. 236,548, and in Ga ay De'cember a, 1926. I

according to known'suggestions, is brought into engagement with a sharpening roller or grinding disc after the termination of each cut, the saidroller or disc being so adjusted thatthe edge of the sickle knife is sharpened thereon in passing it. f

- he sickle knife may be carried by a'carrier which merely executes" a circulating I movement, so that the sickle knife always moves in the same plane. In this case the sickle knife carrier must be moved, during the executionof the'cut, in the direction of feed of the cigarette rod and with the velocity V of feed thereof. There are however alsoconstructions known wherein the sickle knife For both cases various suggestions have already been made with regard to the arrangement of the sharpening roller. In all cases however thesharpening roller is either stationary in position, though rotatably'supported, and is'obliquely placed in such a way that the sickle knife with its'cuttin'g edge, is

sharpened as it: moves past the sharpening roller,'or'else the sickle 'knife is mounted upon a controlled carrier, which. effects substantially a displacement of the sharpening roller in the direction of feed of the'cigarette rod, so that the sharpening roller, "at the appropriate moment, is moved upto the cut ting edge of the sickle knife and then follows the direction of feed of the cigarette cord by virtue of a corresponding displacement in; Carriedby arscrewihreaded p e which.

the movement of the sickle knife.

The present invention consists 1n an arrangement of the sharpening roller which admits of being employed for bothkinds of placement f the Carrie/Man ec e sickle knife guiding, the sharpening roller or grinding disc being so arranged on a circul'ating carrier that at each revolution ofthe carrier it comes once into engagementwith; the cutt ng edge oftherevolvingsickle knife.

In this way. it is possible not only to let the sickle knifexrub over the grinding surface ofthe sharpening roller, but also at the same PATENT OFFICJEIII time to guide the sharpening roller past the cutting edge of the sickleknife in the 0ppo-.

site direction. By this means the time of engagement is shortened, and at the same time the sharpening workis improved.-

sickle knife carrier are preferably carried by a; The sharpening roller carrier andv the. 1

parallel sh aftsrevolving inthe same direc tion and with thesame velocity. 7

These shafts may be lodged in a commonclosed bearingcasing, in which the driving means', originating'from a common driving; shaft, are also lodged, so thatall the driving members are immersed inan oil bath enclosed ln the bearing casing. Y If the s1 kleknife carrier is arranged so as to be obliquely adjustable upon its driv ing shaft, in Well known manner, thesickle knife'w-ill execute a vibrating or wabbling movement by, virtue of which it can follow the direction, of feed, with the velocityof feed, when cutting the eigaretterod. Ifthe sharpening roller carrier is, then at the same time made in more than one ,partand'the parts are adjustable relatively to one another, the sharpening roller or grinding disc can then be so adjusted that during the circulating rotation of, the sharpening roller carrier it follows the vibrating movement of the sickle .knife atthe moment when the. twb parts (sharpening roller and sickle knife) comeinto mutual contact. In this case it is advantageous to arrange the grinding disc carrier on its shaft in alongitudinally slidable but non-rotatable manner and to hold it fast by vmeans of a forkwhich dips into an annular groove in the carrier, the fork being when' the machine is working.

- The accom anying drawingsj'serve for the further eluci ation. of the invention Figure 1 shows the arrangement as a whole, seen from above;

Figure 2is a longitudinal sectional elevation on the line 22 in Figure lt;

Figiire '3 is a cross-sectional elevation on the line 3 3 in Figure 1;

Fig; 3 is a sectional detail along lines 35:3 of Fig; JSIIoOk-ing in the direction *of thegarrowsj; V V

Figure 4 is a View of a detail. o

The sickle knife carrier 1, which carries the "sidkl kiiife 2, eiiibraces with two eyes 3' Upon the-knife carrier-shaft :6 is mounted a heve'l wh 8, which meshes with a hevel wheel 9, ,Thisjatter bevelwheel is carried 'a" bush or sleeve, which-is rotatably arranged u'pon'a vertical spindle l0, and carriessat its "lower end awo m Wheel 11, which meshes with a worm 12 on a driving shaft 13.

"grinding disc 14; is mounted with its spindle15 rotatahly. in ahe'aring-eye 16 which is earned by a cantilever 1-7 This cantilever terminates in 'a'p1ateI8," which is connected screw with a plate '19 on a hub memb'e r Forgth js'crewthreadedjholts 18' secured to "the plate 18 or 19, concentric slot-s 18 re arranged in the other plate through which the bolts pass, so thattelativeadjustment of the plates 18and 19 can take place. Thehub member's'o of the: grinding disccarr i'eris longi'tudinally displaceable on 'a sh'aft 21,, hutis eyed theretohy a key 23, which engages in a longitudinal groove in the internal cylind'fical surface of theh 'ib member 20. The share 21 s jasmine in the same bearing casing "24 in which the knife shaft6' is jourrn'z'i lled'. Upon this :shaft also is mounted a beta than 8', when meshes with a bevel when 9', the sleeve of which i ro up ranges ahouta vertical spindle 1Q, and fat it's ldwer h'd carries a Worm wheel 11', which meshes withaw6fln 12 on a 'drivingshart '13.-

the bevel wheels, worm wheels and worinszare lodged in a closed casing 24, so that they are immersed in an oil bath lodged in assessing; The hub'meniher'QO of the sharp;

ening roller carrier is equipped with an an nular groove 25; into which dips a fork 26, as shownin Figureh This fork is secured to the end of a screwthreaded spindle 27 by means of ,a nu t 27 The unthreaded part of the spindle 27 is guided in a her-e in the casing 24;, which runs parallel to the longitudinal directionof the shaft 21. The part 28' of the spindle 27 is equipped with a pss'isatiig iaat 29; which is mainl has in a cover plate 30, screwed to the casing.

By rotating the positioning nut 29 the spin dle 27 can thus be longitudinally shifted, in which case, owing to the fork 26, it takes the sharpening roller carrier with it. This adjustment canproceed while the machine is worklng.

The directions of rotationof the knife 7 carrier of thesharpening roller e'arrier are'indicated in Figure 3by corresponding arrows.

I The-bevel whee-lewd the-worm wheeisandr o worms are or the same dimensions, so that the shafts 8 and Qlaredriven inthe same direction and with the same velocity.

hat- 1 cl-aimisz a ll Sharpening means for the jevolving sickle knife of a cigarette rod machine, 001g prising a r-evolving carrier, a sharpening roller rotatably mounted on said revolving carrier, and means for causing said sharpening roller to come into engagement with the cutting edge of the revolving sickle knife'ineach revolution, 7

2. Sharpening means for the revolving sickle knife of a cigarette rod machine, comprising two shafts arranged parallel'to one another, means for rotating said shafts inv the same direction and with thesa-me velocity, 7

a revolving carrier, mounted upon oneof said shafts, a sharpening roller grotatably mount-- ed on said revolving carrier, and a sickle knife carrier mounted upon theother of said sl artspsaid shafts and carriers. being so arran ed that the sharpenin-g roller comes into 7 engagement with the cutting edge the re- 'volving sickle knife-once in each revolution,

3. Sharpening means for the revolving sickle knife of a cigarette rod machine, C0111- prising a closedbearing casing, two shafts arranged parallel to one another, in said bearingcasingtwo bevel gears,one keyed its upon each of said shafts, two additional bevelgears meshing respectively with said firstmentioned hovel gears, two worm wheels adapted to drive said further bevel gears, two worms meshing respectively with said worm wheels, a common driving shaft upon which both of said worms are keyed, said worms, worm wheelsand :bevel gears being en-s closed in said bearing casingand being so dimensioned that the two parallel shafts are rotated in the same direction and with the same velocity, a -revolving carrier, mounted upon one of said-shafts, a sharpening roller mounted pn said revolving carrier, and a sickle knife carrier mounted upon the other of said shafts, said shafts and carriers being so arranged that the sharpening roller comes into engagement with the cutting edge of the F revolving sickle knife once in each revolution.

4. Sharpening means for the revolving sickle knife of a -cig-ar'ette rod machine, comprising two shafts arranged parallel to one another, means for rotating said shafts in the same direction and with the same velocity, a revolving carrier, mounted upon one of said shafts, a sharpening roller mounted on said revolving earlier, a sickle'knife carrier mounted upon the other of said shafts, and means for adjusting the inclination of the sickle knife carrier to its shaft, the sharpening roller carrier consisting of relatively adjustable parts adapted to enable the sharpening roller to be correspondingly adjusted, so that the sharpening roller comes into engagement with the cutting edge of the revolving sickle knife once in each revolution.

5. Sharpening means for the revolving sickle knife of a cigarette rod machine, comprising two shafts arranged parallel to one another, means for rotating said shafts in the same direction and with the same velocity, a revolving carrier, slidably keyed upon one of said shafts, said carrier being formed with an annular groove, a sharpening roller mounted on said revolving carrier, a sickle knife carrier mounted upon the other of said shafts, said shafts and carriers being'so arranged that the sharpening roller comes into engagement with the cuttingedge of the revolving sickle knife once in each revolution, a fixed nut, a screw-threadedspindle parallel to the carrier shaft, said spindle engaging with said nut, means for rotating said spindle at will, and a fork mounted on said spindle and engaging in the annular groove in the carrier of the sharpening roller,-to enable the position of the sharpening roller to be adjusted while the machine is working.

6. The combination with a the revolving.

knife of a cigarette rod machine, of sharpening means, means for revolving sald knlfe past a sharpening surface, means for guiding 7 said sharpening surface past the cutting edge of the knife in the opposite direction, to decrease the time of engagement of said knife and'sharpening means, and adjustable means for varying the position of said sharpening surface at will. j 1 e 7. The combination with the revolving knife of a cigarette rod machine, of means for revolving said knife, a freely rotatable sharpening roller, means for revolving said sharpening roller at the same speed as said knife, in the same direction, and adjustable means for varying the position of said sharpening roller, whereby said sharpening roller sweeping past said cutting knife in the opposite direction to the motion of said knife, comes into engagement with it once in each revolution.

In testimony whereof I have signed my name to this specification.

MAX PAUL ERNST HOHN. 

